A fire at the Holly Frontier oil refinery in west Tulsa sent plumes of thick black smoke into the air early Monday evening.

A fire at the Holly Frontier refinery sent black smoke into the air across Tulsa on Monday. The oil refinery is located at ...

A fire at the Holly Frontier refinery sent black smoke billowing into the sky above Tulsa on Monday. The oil refinery is ...

A trail derailed at the Holly Refinery in west Tulsa this morning near 17th street, just west of Highway 75. A jumble of ...

According to a company spokesperson, an “operational upset” led to a fire at the company’s west refinery at about 5 p.m.

TULSA, Okla. — A railroad union is pushing ... pileup at the Burlington Northern Santa Fe Railyard near the Holly Frontier refinery. Luckily, no one was hurt and the main rail line was not ...

A train derailed in Tulsa, blocking 17th Street, with no injuries or hazardous materials reported. The cause is under ...

Tulsa Fire Department partnered with Holly Frontier Fire & HAZMAT to put out ... able to completely finish that process." Nearby Holly refinery also sent fire crews over to the fire with a truck ...

As a result, each refinery benefits from the difference ... All of which amounts to a sound balance sheet in our framework. Holly Frontier also scores a Exemplary rating for its investment ...